﻿386 
  E. 
  H. 
  S. 
  Bailey 
  — 
  Tonganoxie 
  Meteorite. 
  

  

  magnet. 
  After 
  the 
  specimen 
  had 
  been 
  for 
  some 
  time 
  exposed 
  

   to 
  the 
  air, 
  after 
  being 
  handled, 
  numerous 
  droplets 
  of 
  chloride 
  

   of 
  iron 
  appeared 
  on 
  the 
  surface. 
  These 
  seem 
  to 
  exude 
  from 
  

   minute 
  cracks 
  or 
  to 
  come 
  from 
  under 
  the 
  scales. 
  The 
  occur- 
  

   rence 
  of 
  chloride 
  of 
  iron, 
  and 
  its 
  exuding 
  in 
  this 
  way, 
  is 
  by 
  no 
  

   means 
  uncommon 
  in 
  meteorites. 
  To 
  the 
  fact 
  of 
  its 
  presence 
  

   is 
  probably 
  due 
  the 
  great 
  tendency 
  to 
  scale 
  noticed 
  above. 
  

   This 
  iron 
  salt 
  gradually 
  changes 
  to 
  a 
  brown 
  friable 
  oxide. 
  

   The 
  analysis 
  shows 
  the 
  following 
  composition 
  : 
  

  

  Iron 
  91-18 
  

  

  Nickel 
  . 
  7-93 
  

  

  Cobalt 
  0-39 
  

  

  Phosphorus 
  - 
  10 
  

  

  Copper 
  a 
  trace 
  

  

  99-60 
  

  

  A 
  test 
  made 
  for 
  sulphur, 
  on 
  the 
  same 
  sample 
  analyzed 
  above, 
  

   showed 
  only 
  a 
  possible 
  trace, 
  but 
  an 
  examination 
  was 
  made 
  of 
  

   a 
  sample 
  of 
  turnings, 
  somewhat 
  oxidized, 
  and 
  a 
  very 
  percepti- 
  

   ble 
  precipitate 
  of 
  barium 
  sulphate 
  was 
  obtained. 
  Scattered 
  

   over 
  the 
  polished 
  surface 
  may 
  be 
  seen 
  occasional 
  long 
  slender 
  

   crystals, 
  sometimes 
  branching, 
  and 
  also 
  several 
  nodular 
  masses, 
  

   of 
  a 
  bronze 
  color. 
  These 
  are 
  without 
  doubt 
  troilite 
  ; 
  [iron- 
  

   nickel 
  sulphide]. 
  The 
  larger 
  particles 
  are 
  near 
  the 
  center 
  of 
  

   the 
  polished 
  end, 
  as 
  though 
  the 
  last 
  to 
  crystallize. 
  The 
  troilite 
  

   cannot 
  be 
  seen 
  till 
  the 
  surface 
  has 
  been 
  polished 
  with 
  oil 
  and 
  

   emery. 
  As 
  this 
  mineral 
  is 
  so 
  irregularly 
  distributed 
  there 
  was 
  

   probably 
  only 
  a 
  very 
  small 
  quantity 
  in 
  the 
  particular 
  piece 
  

   analyzed. 
  The 
  Widmanstattian 
  figures 
  came 
  out 
  very 
  per- 
  

   fectly 
  with 
  nitric 
  acid. 
  Figure 
  2, 
  reduced 
  one-fifth 
  from 
  a 
  

   photograph, 
  shows 
  the 
  characteristic 
  forms 
  The 
  octahedral 
  

   form 
  of 
  crystallization 
  is 
  apparent, 
  but 
  it 
  is 
  not 
  possible 
  to 
  

   distinguish 
  the 
  Neumann 
  lines, 
  that 
  are 
  believed 
  to 
  indicate 
  the 
  

   cubic 
  form 
  of 
  crystallization. 
  It 
  is 
  however 
  possible, 
  as 
  some 
  

   observers 
  have 
  noted, 
  that 
  some 
  other 
  surface, 
  if 
  polished, 
  

   would 
  show 
  this 
  form. 
  A 
  crack 
  extends 
  across 
  the 
  surface 
  on 
  

   the 
  etched 
  side, 
  and 
  other 
  small 
  cracks 
  lead 
  into 
  it. 
  These 
  

   are 
  all 
  filled 
  with 
  a 
  black 
  mineral, 
  probably 
  made 
  up 
  of 
  the 
  

   oxidized 
  metals. 
  The 
  cracks 
  in 
  an 
  irregular 
  way 
  follow 
  the 
  

   lines 
  between 
  the 
  crystals. 
  

  

  On 
  examining 
  this 
  meteorite 
  with 
  the 
  magnetic 
  needle, 
  it 
  

   was 
  found 
  that 
  there 
  were 
  several 
  distinct 
  poles. 
  Mr. 
  A. 
  G. 
  

   Mayer 
  has 
  plotted 
  the 
  lines 
  of 
  magnetic 
  force, 
  so 
  as 
  to 
  show 
  

   their 
  true 
  relation. 
  The 
  position 
  of 
  the 
  poles 
  might 
  be 
  ex- 
  

   pected 
  to 
  be 
  near 
  the 
  ends, 
  but 
  this 
  is 
  not 
  the 
  case 
  in 
  this 
  

   specimen. 
  

  

  